Frank wankel



UNITED STATES PATENT OEErcE.

FRANK XVANKEL, OF BROOKLYN, NEl/V YORK, ASSIGNOR OF ONE-HALF TO XVILLIAM GEPPERT, OF SAME PLACE.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 565,100, dated August 4, 1896.

Application filed January 11, 1896. Serial No. 576,125. (No model.)

To all whom it may concern: pivotedto the free end of the arm 0, that Be it known that I, FRANK ANKEL, of when the weight flies outward by centrifu- Brooklyn, Kings county, New York, have ingal force the strap is tightened up around the vented an Improved Door-Check, of which drum to apply the brake, while when the the following is a specification. weight flies inward the strap is slaekened to This invention relates to a door-check which take off the brake. The connection between is so constructed that a brake mechanism is brake-strap and weight can be made as set into operation by the closing of the door. shown in the drawings, in which a lever f is The resistance oifered by this mechanism is shown to be pivoted to the arm c atf". One

[0 proportioned to the force with which the door end of the strap 6 is attached to this pivot, is closed, and thus the door is closed with a while the other end of the brake-strap is atgentle but positive force, which prevents tached to the lever at f. The free end of the slamming. lever f is connected to a rod f which passes In the accompanying drawings, Figure 1is through a perforated stud. of weight 0.

15 a front elevation of my improved door-check. The threaded outer end of rod f is engaged 6 5 Fig. 2 is a plan thereof; Fig. 3, a vertical secby a nut f which may be set to vibrate lever tion on line 3 3, Fig. 1; Fig. 4c, a horizontal f, and to thereby decrease or increase the resection on line a 4:, Fig. 1; Fig. 5, a horizonsistance offered by the brake. tal section on line 5 5, Fig. 1; and Fig 6, a The brake acts by means of an arm or shoe '20 horizontal sect-ion on line 6 6, Fig. 1. 9 having spring or buffer This shoe is The letter A represents a doorhinged within made integral with the drum 6 and is adapted its frame A. To the door A there is attached to bear against the frame A. hen the a frame or bracket a, carrying a revoluble door is opened, this shoe is held back, preferspindle a, that projects above the upper edge ably by a stop g, projecting upwardly from 2 5 of the door. To the spindle a is affixed the door-A. \Vhen the dooris released and closed inner end of a coiled spring I), the free end of by the spring I), the weight 0 will, by centrifwhich has a bearing against the base-plate of ugal force, be thrown outward to tighten the frame a. To the spindle a is also attached, brake-strap around its drum, and to thus apin manner hereinafter specified, acurved arm ply the brake by causing the arm 8 to bear 30 or lever c. To the free end of this arm is seyieldingly against frame A'. After the door cured one end of a strap d, the other end of has closed the tension of the brake-strap will which is secured to the door-frame A at a draw the weight 0 inward to take the friction distance back of the pivoted end of arm cby off the drum, when the parts will again be in means of the pin (1'. operative position for the next opening of the As thus far described the operation is as door. 8; follows: hen the door is opened, the arm 0 I prefer to connect the arm 0 to the spindle will be drawn backward by the strap (1, so as a in such a manner that the tension of the to revolve the spindle a and wind up the spring I) may be regulated. .To this effect I spring I). Dotted lines, Fig. 2.) \Vhen the secure upon a squared section of spindle a 4o'd0or is released, the spring will, by exerting a ratchet-wheel 7t, the teeth of which are en- 0 its power against the spindle, revolve the arm gaged by a pawl h, pivoted to arm 0. This forward to draw against the strap and close arm is loosely mounted upon the spindle, but the door. (Full lines, Fig. 2.) is locked thereto by means of the pawl 7t and In order to provide the door-check with a the strap d. W'hen the tension of the spring 45 brake mechanism which prevents slamming b is to be regulated, the pawl 72 is thrown out 5 of the door, I employ the following construcof engagement with the wheel 71., the arm 0 is tion: Upon the upper end of the spindle a, slightly rotated, and the pawl is brought into there is revolubly mounted a brake-drum e, rengagement with the ratchet-wheel. In around which is coiled a brake strap, rope, or this way the working angle of the arm, and 50 wire 2'. Thisstrapisso connected toa weight consequently the power developed by the spring, is changed. To permit the above-described adjustment to be easily eiiected, I pivot a pawl W to the arm a This pawl may be brought into engagement with the wheel h by using the arm 6 as a handle. Thus the pawl 7L serves to rotate the wheel h, and consequently the spindle a, to any desired extent, during which rotation the pawl h is of course thrown out of engagement with the wheel.

The advantages connected with my improved door-check are that it is not apt to get out of order, is readily adjustable, and that owing to the centrifugal action of the brake the resistance offered by the check is in proportion to the power employed in closing the door.

hat I claim is 1. In a door check and closer, at power-aotuated'arm, a weight pivoted thereto, a brakeshoe adapted to engage the door-frame, and a brake mechanism actuated by the weight and connected to the brake-shoe, substantially as specified.

2. In a door check and closer, a power--210- tuated arm, aweight pivoted thereto, a brakedrum, and a brake-strap operated by said weight, substantially as specified.

3. In a door check and closer, a power-actuated arm, a weight pivoted thereto, a brakedrum, a lever pivoted to the arm, a brakestrap secured to the lever, and a rod for adjustably connecting the lever to the weight, substantially as specified.

at. In a door check andcloser, a power-actuated arm, a strap connecting the arm to the door-frame, a brake-drum, a weight pivoted to the arm, a brake-strap actuated by the weight, and a brake-shoe adapted to engage the door-frame, substantially as specified.

5. In a door check and closer, a power-actuated arm, a strap connecting the arm to the door-frame, a brake-drum, a weight pivoted to the arm, a brake-strap actuated by the weight, a brake-shoe adapted to engage the door-frame, and a pawl and ratchet for connecting the arm to the arm-spindle, substantially as specified.

FRANK WANKEL. Vitnesses:

WILLIAM Gnrrnn'r, F. v. BRIESEN. 

